Electrochromic characteristics of porous nanosheet-structured nickel oxide films with cobalt and zinc dopants
Electrochromic characteristics of porous nanosheet-structured nickel oxide films with cobalt and zinc dopants
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DOI：
10.1016/j.matlet.2021.130755
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发表时间：
2021-12
影响因子：
3
通讯作者：
K. Kim;Yuya Ishita;Y. Abe
中科院分区：
文献类型：
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作者：
K. Kim;Yuya Ishita;Y. Abe
采用一锅溶液法在导电氧化物衬底上直接制备了多孔纳米氧化镍（NiO）薄膜。通过添加钴（Co）掺杂剂，促进了垂直排列纳米片的生长。然而，与NiO和Co-NiO薄膜相比，锌掺杂的NiO薄膜具有松散的纳米片结构，在衬底表面的覆盖率相对较低。所有NiO薄膜都表现出电致变色特性。在有色状态下，NiO、Co-NiO和Zn-NiO薄膜分别为深棕色、黑色和棕色。在漂白状态下，NiO、Co-NiO和Zn-NiO薄膜分别为淡灰色、淡黄色和透明。Co-NiO薄膜的开关时间（tc~ 2s,tb~ 6s）略慢于NiO薄膜（tc~ 1s,tb~ 1s）和Zn-NiO薄膜（tc~ 1s,tb~ 2s）。然而，与NiO和Zn-NiO薄膜相比，它具有更好的透射率调制（在700 nm处约58%）和优异的记忆耐久性（在3000 s后提高约2%）。掺杂剂可以方便有效地改变NiO薄膜的电致变色性能。
Porous nanosheet-structured nickel oxide (NiO) films were directly prepared on conductive oxide substrates using a cost-effective and simple one-pot solution method. By incorporating cobalt (Co) dopant, the growth of vertically aligned nanosheet was promoted. However, zinc (Zn)-doped NiO film had the loose-packed nanosheet-structure with relatively low coverage on the surface of the substrate compared to the NiO and Co-NiO films. All the NiO films exhibited electrochromic properties. In the colored state, the NiO, Co-NiO, and Zn-NiO films were dark brown, black, and brown, respectively. In the bleached state, the NiO, Co-NiO, and Zn-NiO films were pale gray, pale yellow, and transparent, respectively. The switching time of the Co-NiO film (tc~ 2 s,tb~ 6 s) was slightly slower than those of the NiO (tc~ 1 s,tb~ 1 s) and Zn-NiO (tc~ 1 s,tb~ 2 s) films. However, it had better transmittance modulation (~58% at 700 nm) with excellent memory durability (increased by ~2% after 3,000 s) than the NiO and Zn-NiO films. Dopants could easily and effectively modify the electrochromic performance of NiO films.